Do you ever wonder whether your irritable or unhappy adolescent might actually be experiencing teen depression? Of course, most teens feel unhappy at times. And when you add hormone havoc to the many other changes happening in a teen's life, it's easy to see why their moods swing like a pendulum. Yet findings show that one out of every eight adolescents has teen depression. But depression can be treated as well as the serious problems that come with it. So if your teen's unhappiness lasts for more than two weeks and he or she displays other symptoms of depression, it may be time to seek help from a health professional.

Why do adolescents get depression?

There are multiple reasons why a teenager might become depressed. For example, teens can develop feelings of worthlessness and inadequacy over their grades. School performance, social status with peers, sexual orientation, or family life can each have a major effect on how a teen feels. Sometimes, teen depression may result from environmental stress. But whatever the cause, when friends or family -- or things that the teen usually enjoys -- don't help to improve his or her sadness or sense of isolation, there's a good chance that he or she has teen depression.

What are the symptoms of teen depression?

Often, kids with teen depression will have a noticeable change in their thinking and behavior. They may have no motivation and even become withdrawn, closing their bedroom door after school and staying in their room for hours.

Kids with teen depression may sleep excessively, have a change in eating habits, and may even exhibit criminal behaviors such as DUI or shoplifting. Here are more signs of depression in adolescents even though they may or may not show all signs: